Will a Broken Thermostat Cause Boiling Over?

[DiIan]

Whether a broken thermostat causes boiling over depends on the coolant circulation mode: 1. If the coolant is in a small circulation loop, it may lead to boiling over; 2. If the coolant is in a large circulation loop, it won't cause boiling over. Thermostat boiling over refers to coolant boiling. Cars equipped with water-cooled engines rely on continuous coolant circulation within the engine for heat dissipation. The thermostat's function is to automatically adjust the amount of coolant entering the radiator based on its temperature, altering the circulation range to regulate the cooling system's heat dissipation capacity, ensuring the engine operates within an appropriate temperature range. The thermostat must maintain good technical condition. If the main valve opens too late, it can cause engine overheating; if it opens too early, the engine warm-up time will be prolonged, resulting in the engine running too cold.